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/* Certificate request creation. Demonstrates some request related
* operations.
*/
#include <stdio.h>
#include <stdlib.h>
#include <openssl/pem.h>
#include <openssl/conf.h>
#include <openssl/x509.h>
#include <openssl/x509v3.h>
#ifndef OPENSSL_NO_ENGINE
#include <openssl/engine.h>
#endif
int mkreq(X509_REQ **x509p, EVP_PKEY **pkeyp, int bits, int serial, int days);
int add_ext(STACK_OF(X509_EXTENSION) *sk, int nid, char *value);
int main(int argc, char **argv)
{
BIO *bio_err;
X509_REQ *req=NULL;
EVP_PKEY *pkey=NULL;
CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_ON);
bio_err=BIO_new_fp(stderr, BIO_NOCLOSE);
mkreq(&req,&pkey,512,0,365);
RSA_print_fp(stdout,pkey->pkey.rsa,0);
X509_REQ_print_fp(stdout,req);
PEM_write_X509_REQ(stdout,req);
X509_REQ_free(req);
EVP_PKEY_free(pkey);
#ifndef OPENSSL_NO_ENGINE
ENGINE_cleanup();
#endif
CRYPTO_cleanup_all_ex_data();
CRYPTO_mem_leaks(bio_err);
BIO_free(bio_err);
return(0);
}
static void callback(int p, int n, void *arg)
{
char c='B';
if (p == 0) c='.';
if (p == 1) c='+';
if (p == 2) c='*';
if (p == 3) c='\n';
fputc(c,stderr);
}
int mkreq(X509_REQ **req, EVP_PKEY **pkeyp, int bits, int serial, int days)
{
X509_REQ *x;
EVP_PKEY *pk;
RSA *rsa;
X509_NAME *name=NULL;
STACK_OF(X509_EXTENSION) *exts = NULL;
if ((pk=EVP_PKEY_new()) == NULL)
goto err;
if ((x=X509_REQ_new()) == NULL)
goto err;
rsa=RSA_generate_key(bits,RSA_F4,callback,NULL);
if (!EVP_PKEY_assign_RSA(pk,rsa))
goto err;
rsa=NULL;
X509_REQ_set_pubkey(x,pk);
name=X509_REQ_get_subject_name(x);
/* This function creates and adds the entry, working out the
* correct string type and performing checks on its length.
* Normally we'd check the return value for errors...
*/
X509_NAME_add_entry_by_txt(name,"C",
MBSTRING_ASC, "UK", -1, -1, 0);
X509_NAME_add_entry_by_txt(name,"CN",
MBSTRING_ASC, "OpenSSL Group", -1, -1, 0);
#ifdef REQUEST_EXTENSIONS
/* Certificate requests can contain extensions, which can be used
* to indicate the extensions the requestor would like added to
* their certificate. CAs might ignore them however or even choke
* if they are present.
*/
/* For request extensions they are all packed in a single attribute.
* We save them in a STACK and add them all at once later...
*/
exts = sk_X509_EXTENSION_new_null();
/* Standard extenions */
add_ext(exts, NID_key_usage, "critical,digitalSignature,keyEncipherment");
/* This is a typical use for request extensions: requesting a value for
* subject alternative name.
*/
add_ext(exts, NID_subject_alt_name, "email:steve@openssl.org");
/* Some Netscape specific extensions */
add_ext(exts, NID_netscape_cert_type, "client,email");
#ifdef CUSTOM_EXT
/* Maybe even add our own extension based on existing */
{
int nid;
nid = OBJ_create("1.2.3.4", "MyAlias", "My Test Alias Extension");
X509V3_EXT_add_alias(nid, NID_netscape_comment);
add_ext(x, nid, "example comment alias");
}
#endif
/* Now we've created the extensions we add them to the request */
X509_REQ_add_extensions(x, exts);
sk_X509_EXTENSION_pop_free(exts, X509_EXTENSION_free);
#endif
if (!X509_REQ_sign(x,pk,EVP_sha1()))
goto err;
*req=x;
*pkeyp=pk;
return(1);
err:
return(0);
}
/* Add extension using V3 code: we can set the config file as NULL
* because we wont reference any other sections.
*/
int add_ext(STACK_OF(X509_EXTENSION) *sk, int nid, char *value)
{
X509_EXTENSION *ex;
ex = X509V3_EXT_conf_nid(NULL, NULL, nid, value);
if (!ex)
return 0;
sk_X509_EXTENSION_push(sk, ex);
return 1;
}
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